// ReactOS驱动适配层实现
// 这个模块提供了ReactOS驱动在ZENrs中的运行环境

use std::collections::HashMap;
use std::sync::Arc;
use std::sync::RwLock;
use std::ptr::null_mut;

// 定义设备信息结构
pub struct DeviceInfo {
    pub id: u64,
    pub vendor_id: u32,
    pub device_id: u32,
    pub class_id: u32,
    pub subclass_id: u32,
    pub prog_if: u32,
    pub bus_type: BusType,
    pub bus_info: *mut std::os::raw::c_void,
}

// 总线类型枚举
#[repr(u32)]
pub enum BusType {
    PCI = 1,
    USB = 2,
    I2C = 3,
    SPI = 4,
    ISA = 5,
    ACPI = 6,
    Other = 0,
}

// ReactOS驱动参数类型
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum ModuleParamType {
    INT,
    UINT,
    LONG,
    ULONG,
    STRING,
    BOOL,
    CHAR,
    UCHAR,
}

// ReactOS驱动参数
pub struct ModuleParam {
    pub name: String,
    pub param_type: ModuleParamType,
    pub value: Box<dyn std::any::Any>,
    pub perm: u32,
}

// ReactOS驱动结构
pub struct ReactOSDriver {
    pub name: String,
    pub description: String,
    pub version: u32,
    pub driver_path: String,
    pub driver_object: *mut std::os::raw::c_void, // 对应DRIVER_OBJECT
    pub registry_path: String,
    pub parameters: Vec<ModuleParam>,
    pub private_data: *mut std::os::raw::c_void,
}

impl ReactOSDriver {
    // 创建ReactOS驱动
    pub fn new(name: &str, description: &str, version: u32) -> Self {
        Self {
            name: name.to_string(),
            description: description.to_string(),
            version: version,
            driver_path: String::new(),
            driver_object: null_mut(),
            registry_path: String::new(),
            parameters: Vec::new(),
            private_data: null_mut(),
        }
    }
    
    // 转换为DriverInterface
    pub fn to_driver_interface(&self) -> DriverInterface {
        DriverInterface {
            name: self.name.clone(),
            description: self.description.clone(),
            version: self.version,
            init: Some(Self::driver_init),
            deinit: Some(Self::driver_deinit),
            probe: Some(Self::driver_probe),
            remove: Some(Self::driver_remove),
            ioctl: Some(Self::driver_ioctl),
            private_data: self.private_data,
        }
    }
    
    // 驱动初始化回调
    pub extern "C" fn driver_init(allocator: *mut std::os::raw::c_void, driver_data: *mut std::os::raw::c_void) -> bool {
        // 这里实现驱动初始化逻辑
        true
    }
    
    // 驱动卸载回调
    pub extern "C" fn driver_deinit(driver_data: *mut std::os::raw::c_void) {
        // 这里实现驱动卸载逻辑
    }
    
    // 设备探测回调
    pub extern "C" fn driver_probe(device_info: *mut DeviceInfo) -> bool {
        // 这里实现设备探测逻辑
        true
    }
    
    // 设备移除回调
    pub extern "C" fn driver_remove(device_id: u64) {
        // 这里实现设备移除逻辑
    }
    
    // IO控制回调
    pub extern "C" fn driver_ioctl(device_id: u64, cmd: u32, data: *mut std::os::raw::c_void, size: u64) -> isize {
        // 这里实现IO控制逻辑
        0
    }
    
    // 加载ReactOS驱动二进制
    pub fn load_driver_binary(&mut self, path: &str) -> Result<(), String> {
        // 在实际实现中，这里应该：
        // 1. 打开驱动文件
        // 2. 解析PE格式
        // 3. 加载驱动代码和数据
        // 4. 查找DriverEntry函数
        
        self.driver_path = path.to_string();
        Ok(())
    }
    
    // 初始化驱动
    pub fn initialize(&mut self) -> Result<(), String> {
        // 模拟调用DriverEntry函数
        // 在实际实现中，这里应该调用驱动的DriverEntry函数
        Ok(())
    }
    
    // 卸载驱动
    pub fn unload(&mut self) {
        // 模拟调用DriverUnload函数
        // 在实际实现中，这里应该调用驱动的DriverUnload函数
    }
}

// ZENrs驱动接口
#[repr(C)]
pub struct DriverInterface {
    pub name: String,
    pub description: String,
    pub version: u32,
    pub init: Option<extern "C" fn(*mut std::os::raw::c_void, *mut std::os::raw::c_void) -> bool>,
    pub deinit: Option<extern "C" fn(*mut std::os::raw::c_void)>,
    pub probe: Option<extern "C" fn(*mut DeviceInfo) -> bool>,
    pub remove: Option<extern "C" fn(u64)>,
    pub ioctl: Option<extern "C" fn(u64, u32, *mut std::os::raw::c_void, u64) -> isize>,
    pub private_data: *mut std::os::raw::c_void,
}

// ReactOS驱动适配管理器
pub struct ReactOSDriverAdapterManager {
    drivers: Arc<RwLock<HashMap<String, ReactOSDriver>>>,
}

impl ReactOSDriverAdapterManager {
    // 创建新的管理器实例
    pub fn new() -> Self {
        Self {
            drivers: Arc::new(RwLock::new(HashMap::new())),
        }
    }
    
    // 注册驱动
    pub fn register_driver(&self, driver: ReactOSDriver) -> Result<(), String> {
        let mut drivers = self.drivers.write().map_err(|e| e.to_string())?;
        drivers.insert(driver.name.clone(), driver);
        Ok(())
    }
    
    // 获取驱动
    pub fn get_driver(&self, name: &str) -> Option<ReactOSDriver> {
        let drivers = self.drivers.read().ok()?;
        drivers.get(name).cloned()
    }
    
    // 加载驱动
    pub fn load_driver(&self, path: &str, name: &str, description: &str, version: u32) -> Result<DriverInterface, String> {
        let mut driver = ReactOSDriver::new(name, description, version);
        driver.load_driver_binary(path)?;
        driver.initialize()?;
        
        self.register_driver(driver.clone())?;
        Ok(driver.to_driver_interface())
    }
    
    // 卸载驱动
    pub fn unload_driver(&self, name: &str) -> Result<(), String> {
        let mut drivers = self.drivers.write().map_err(|e| e.to_string())?;
        if let Some(mut driver) = drivers.remove(name) {
            driver.unload();
            Ok(())
        } else {
            Err(format!("Driver {} not found", name))
        }
    }
    
    // 列出所有已加载的驱动
    pub fn list_drivers(&self) -> Vec<String> {
        let drivers = self.drivers.read().ok();
        match drivers {
            Some(drivers) => drivers.keys().cloned().collect(),
            None => Vec::new(),
        }
    }
}

// 全局驱动适配管理器实例
lazy_static::lazy_static! {
    pub static ref REACTOS_DRIVER_MANAGER: ReactOSDriverAdapterManager = ReactOSDriverAdapterManager::new();
}

// 模拟ReactOS/WDM内核API

// DbgPrint函数实现
extern "C" fn DbgPrint(format: *const std::os::raw::c_char, ...) -> i32 {
    unsafe {
        // 在实际实现中，这里应该将调试信息输出到日志系统
        let format_str = std::ffi::CStr::from_ptr(format).to_str().unwrap_or("<Invalid format>");
        println!("[ReactOS] {}", format_str);
    }
    0
}

// ExAllocatePoolWithTag函数实现
extern "C" fn ExAllocatePoolWithTag(pool_type: u32, size: u64, tag: u32) -> *mut std::os::raw::c_void {
    // 在实际实现中，这里应该使用适当的内存分配器
    let mut vec = Vec::<u8>::with_capacity(size as usize);
    let ptr = vec.as_mut_ptr();
    std::mem::forget(vec);
    ptr as *mut std::os::raw::c_void
}

// ExFreePool函数实现
extern "C" fn ExFreePool(ptr: *mut std::os::raw::c_void) {
    // 在实际实现中，这里应该释放之前分配的内存
    // 注意：这里的实现是简化版，实际应该跟踪分配的内存大小
}

// RtlCopyMemory函数实现
extern "C" fn RtlCopyMemory(
    destination: *mut std::os::raw::c_void,
    source: *const std::os::raw::c_void,
    length: u64
) {
    unsafe {
        std::ptr::copy_nonoverlapping(source, destination, length as usize);
    }
}

// RtlZeroMemory函数实现
extern "C" fn RtlZeroMemory(destination: *mut std::os::raw::c_void, length: u64) {
    unsafe {
        std::ptr::write_bytes(destination, 0, length as usize);
    }
}

// RtlInitUnicodeString函数实现
extern "C" fn RtlInitUnicodeString(
    destination_string: *mut std::os::raw::c_void, // 简化版，实际应该是UNICODE_STRING*
    source_string: *const u16 // LPCWSTR
) {
    // 在实际实现中，这里应该初始化UNICODE_STRING结构体
}

// IoCreateDevice函数实现
extern "C" fn IoCreateDevice(
    driver_object: *mut std::os::raw::c_void, // PDRIVER_OBJECT
    device_extension_size: u64,
    device_name: *const std::os::raw::c_void, // PUNICODE_STRING
    device_type: u32,
    device_characteristics: u32,
    exclusive: bool,
    device_object: *mut *mut std::os::raw::c_void // PDEVICE_OBJECT*
) -> i32 {
    // 在实际实现中，这里应该创建设备对象
    0 // STATUS_SUCCESS
}

// IoDeleteDevice函数实现
extern "C" fn IoDeleteDevice(device_object: *mut std::os::raw::c_void) {
    // 在实际实现中，这里应该删除设备对象
}

// IoCreateSymbolicLink函数实现
extern "C" fn IoCreateSymbolicLink(
    symbolic_link_name: *const std::os::raw::c_void, // PUNICODE_STRING
    device_name: *const std::os::raw::c_void // PUNICODE_STRING
) -> i32 {
    // 在实际实现中，这里应该创建符号链接
    0 // STATUS_SUCCESS
}

// IoDeleteSymbolicLink函数实现
extern "C" fn IoDeleteSymbolicLink(symbolic_link_name: *const std::os::raw::c_void) {
    // 在实际实现中，这里应该删除符号链接
}

// IoCompleteRequest函数实现
extern "C" fn IoCompleteRequest(irp: *mut std::os::raw::c_void, priority_boost: i8) {
    // 在实际实现中，这里应该完成IRP请求
}

// IoGetCurrentIrpStackLocation函数实现
extern "C" fn IoGetCurrentIrpStackLocation(irp: *mut std::os::raw::c_void) -> *mut std::os::raw::c_void {
    // 在实际实现中，这里应该返回当前IRP栈位置
    null_mut()
}

// 导出这些函数供ReactOS驱动使用
#[no_mangle]
pub static DbgPrint_ptr: *const std::os::raw::c_void = DbgPrint as *const std::os::raw::c_void;

#[no_mangle]
pub static ExAllocatePoolWithTag_ptr: *const std::os::raw::c_void = ExAllocatePoolWithTag as *const std::os::raw::c_void;

#[no_mangle]
pub static ExFreePool_ptr: *const std::os::raw::c_void = ExFreePool as *const std::os::raw::c_void;

#[no_mangle]
pub static RtlCopyMemory_ptr: *const std::os::raw::c_void = RtlCopyMemory as *const std::os::raw::c_void;

#[no_mangle]
pub static RtlZeroMemory_ptr: *const std::os::raw::c_void = RtlZeroMemory as *const std::os::raw::c_void;

#[no_mangle]
pub static RtlInitUnicodeString_ptr: *const std::os::raw::c_void = RtlInitUnicodeString as *const std::os::raw::c_void;

#[no_mangle]
pub static IoCreateDevice_ptr: *const std::os::raw::c_void = IoCreateDevice as *const std::os::raw::c_void;

#[no_mangle]
pub static IoDeleteDevice_ptr: *const std::os::raw::c_void = IoDeleteDevice as *const std::os::raw::c_void;

#[no_mangle]
pub static IoCreateSymbolicLink_ptr: *const std::os::raw::c_void = IoCreateSymbolicLink as *const std::os::raw::c_void;

#[no_mangle]
pub static IoDeleteSymbolicLink_ptr: *const std::os::raw::c_void = IoDeleteSymbolicLink as *const std::os::raw::c_void;

#[no_mangle]
pub static IoCompleteRequest_ptr: *const std::os::raw::c_void = IoCompleteRequest as *const std::os::raw::c_void;

#[no_mangle]
pub static IoGetCurrentIrpStackLocation_ptr: *const std::os::raw::c_void = IoGetCurrentIrpStackLocation as *const std::os::raw::c_void;

// 驱动入口点
extern "C" fn reactos_driver_adapter_init() {
    // 初始化ReactOS驱动适配层
    println!("ReactOS驱动适配层初始化成功");
}